The data listed below are claimed for power cycles operating between hot and cold reservoirs at 1000 K and 400 K, respectively. For each case determine whether such a cycle is in keeping with the first and second laws of thermodynamics. a) Qh=300 kJ, W(cycle)=160kJ, Qc=140 kJb) Qh=300 kJ, W(cycle)=180kJ, Qc=120 kJc) Qh=300 kJ, W(cycle)=170kJ, Qc=140 kJd) Qh=300 kJ, W(cycle)=200kJ, Qc=100 kJ

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature